Calculate the luminosity of the star with an apparent magnitude of 2. Given the Sun has an apparent magnitude of -26.57 and 3.9 × 1026 W luminosity.
Q: Two stars are in a binary system. One is known to have a mass of 0.700 solar masses. If the system…
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Q: The surface of a star usually has the highest temperature O True O False
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A: Given that:-Luminosity, L=78.4×1026 Watt.Radius, r= 1.2×106 kmr= 1.2×106×103m=1.2×109 mWe know…
Q: If a star has a surface temperature 2 times lower than the Sun's and a luminosity the same as the…
A: Given, If To is the surface temperature of the sun, Lo is the luminosity of the sun Then for the…
Q: A newly discovered bright star has a luminosity of 78.4×1026 w. What is its temperature if it has a…
A: Luminosity is an absolute measure of radiant power, that is, its value is independent of an…
Q: A star is observed with a surface temperature of 3,000 K and a luminosity of 100,000 solar…
A: Given , Temperature = 3000 K Solar Luminosity = 100,000 Now , mass and luminosity are related by…
Q: Two stars are in a binary system. One is known to have a mass of 0.700 solar masses. If the system…
A:
Q: A newly discovered bright star has a luminosity of 78.4×1026 W. What is its temperature if it has a…
A:
Q: If star B is a 5th magnitude star and star C is 9th magnitude, what is their brightness ratio? Light…
A: Apparent magnitude of the star m is the measure of brightness of star from earth. Brightness is also…
Q: If a neutron star has a radius of 9.12 km and a temperature of 3.63 x 106 K, how luminous is it in…
A: 1)Using stefan's lawP = σ A T4Where P is the power σ is the stefan's constant A is the area of…
Q: An M dwarf star of mass 0.1 solar masses, a radius of 0.13 solar radii and a photospheric…
A: Mass of M dwarf star, m = 0.1x solar mass M Radius of M dwarf star, r= 0.13 solar radii R The…
Q: Calculate the luminosity of an 8 solar mass star.
A: The luminosity of a star is the amount of energy that it radiates per second. It can be considered…
Q: Which star in the table below has the greatest diameter? Star Name d (parsecs) Parallax…
A: d. 58 Ori
Q: Star A has an effective temperature of TA = 7200 K and a radius of RA = 2.04R , asecond star, Star…
A: Let LA be defined as the luminosity of star A and LB be defined as the luminosity of star B. The…
Q: A white dwarf star has a visual luminosity of 0.046LSun. If you were 1 AU from the white dwarf, what…
A: Ldwarf = 0.046Lsun Distance d = 1 AU = 1.496×1011 m Lsun = 3.827×1026 W
Q: Favorite Star Polaris is 132 pc from Earth and has an apparent magnitude of 2.5. What is its…
A: When the brightness of a star is measured there are two ways, Apparent and absolute magnitudes.…
Q: A star is observed to be thrice the size of the Sun with temperature of 1.3Tsun. Estimate its…
A: The energy radiated by a star is defined as its luminosity. Luminosity depends on the temperature…
Q: If a star has a parallax of 0.016 arc second how far is it?
A: Parallax is the shift in the apparent position of stars when observed from different positions. This…
Q: . The spectrum of Star A peaks at 700 nm. The spectrum of Star B peaks at 470 nm. We know nothing…
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Q: Consider the colour-magnitude diagrams for the three stellar clusters in the image below. Which of…
A: The given data is made using a B-V filter. It is a blue filter that only allows blue wavelength and…
Q: Mention a method to measure temperature of a star.
A: Temperature of the stars cannot be measured directly as they are very far.
Q: A certain star is 13.7 times dimmer than a star with apparent magnitude m = 3.9. What is the…
A: We are given the ratio of brightness of stars. We are given the apparent magnitude of the brighter…
Q: What is the luminosity of a star having three times the radius of the Sun and a surface temperature…
A: The luminosity of a star is a measure of the total amount of energy that is radiated by a star per…
Q: If a star has a parallax of 2 x 10 degree, how far away is it? O 7 pc O 14 pc O 28 pc O 5x 104 LY
A: Given, parallax angle θ=2 x 10-5 degree θ=2 x 10-5 x 3600…
Q: A newly discovered bright star has a luminosity of 78.4×1026 W. What is its temperature if it has a…
A:
Q: .
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Q: ou observe a star with a telescope over the course of a year. You find that this star has a flux…
A: .In vertical direction:psinθ=40sin60Psinθ=4032Psinθ=34.6410 free body diagram:
Q: A distant F0 star is 6.3 times less bright than a nearer F0 star which has a parallax of 0.2…
A: Given: p=0.2 arcsec The distance of the distant F0 star from the nearer F0 star is : d=1p=10.2=5…
Q: In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm. If the line…
A: vr=cλ0-λλ0
Q: If a T Tauri star is the same temperature as the sun but is ten times more luminous, what is its…
A: The energy radiated by a star per second is known as its luminosity and is directly proportional to…
Q: In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm . If the…
A: Wavelength of (λ°) = 481.6 nm Difference of wavelength ∆ λ = λ- λ° = 486.1- 485.8 = 0.3 nm Speed of…
Q: Calculate the absolute magnitude of a star at a distance of 6 pc with an apparent magnitude of 3.
A: The apparent magnitude and absolute magnitude are two terms used to define the brightness of a star.…
Q: If a T Tauri star is the same temperature as the Sun but is eighteen times more luminous, what is…
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Q: A star has a luminosity (power output) of 9.2x1026 W and a diameter of 6.1x108 m. What is its…
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Q: The flux received at the Earth from Supernova 1885 was 3.0182 x 10 10 W/m?. The luminosity of the…
A: flux (I) = 3.0182×10-10 Wm2luminosity = 6×109 solar luminosities
Q: A star has a parallax angle of 0.0270 arcseconds and an apparent magnitude of 4.641. What is the…
A: According to the guidelines, only one question will be answered. Please submit the other question…
Q: This star has a mass of 3.3 MSun. What is the main sequence lifetime of this star? You may assume…
A: The main sequence lifetime is given as:t α1M2.5it is given star has mass of 3.3 MSunSo,…
Q: We will take a moment to compare how brightly a white dwarf star shines compared to a red giant…
A: The luminosity () of a star is related to its surface temperature () and radius () through the…
Q: a star with a radius of 12 that of the sun but a surface temperature of 0.5 times that of the sun be…
A: The luminosity of a star can be given by Stefan-Boltzmann's law as L=σAT4σ is Stefan-Boltzmann…
Q: Choose the statements that correctly describe the characteristics of the stars located in the…
A: Option-E is the correct option.
Q: 14 Suppose you see two main-sequence stars of the same spectral type. Star 1 is dimmer in apparent…
A: We know apparent magnitude(m) is related Radiant flux (F): F2F1=100(m1-m2)/5And…
Q: A star has a period of P = 37 days. It has a radius of 5.7 times the radius of the sun. Calculate…
A: The period of the star: P = 37 days (37 x 24 x 60 x 60 seconds = 3.2 x 106 seconds); The radius of…
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